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- Sajid Mahmood (born 1981) – Lancashire and England cricketer.
- Paul Mariner (born 1953) – former professional footballer with Plymouth Argyle, Ipswich Town, Arsenal and Portsmouth, currently back with old club Plymouth as Head Coach - born in Farnworth.
- George Marsh (1515–1555) – born in Deane, he was a Protestant Martyr who was burnt at the stake for his faith at Boughton, Chester.
- Lee Mason (born 1971) – English Premier League Referee - educated at Thornleigh Salesian College in Bolton.
- Patrick McGuinness (born 1973) – stand-up comedian and comedy actor.
- Sir Ian McKellen (born 1939) – stage and screen actor; born in Burnley and educated at Bolton School.
- Thomas Moran (1837–1926) – American landscape painter.
- Geoffrey Moorhouse (born 1931) – travel writer, novelist and poet.
Read more about this topic: List Of People From Bolton